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Process intensification in wastewater treatment: oxygen transfer characterisation of a jet loop reactor for aerobic biological wastewater treatment

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  • B. Keskinler
  • G. Akay
  • T. Pekdemir
  • E. Yildiz
  • A. Nuhoglu

Abstract

The overall volumetric mass transfer coefficient (KLa) and the overall gas holdup (ε) were measured in a jet loop reactor (JLR) used for the intensive aerobic biological treatment of waste water. The process parameters and their ranges were: inlet water flow rate: 30 &#le; QL &#le; 70 l/min, inlet air flow rate: 4 &#le; Qg &#le; 36 l/min. The ratio of water flow rates from the bottom of the reactor (QB) and the inlet water flow rate (QL) varied in the range 0.0 &#le; QB/QL &#le; 0.92. It was found that, both KLa, and ε increased with increasing Qg. Up to a critical Qg value, neither KLa nor ε varied with energy dissipation rate per unit volume, E/V, but beyond these Qg values, KLa decreased while ε increased with increasing E/V. Water withdrawal from the bottom of the reactor in addition to that from the top, increased KLa up to 30% depending on the process conditions. Use of pure oxygen instead of air could also lead to increases in KLa up to 19%.

Suggested Citation

  • B. Keskinler & G. Akay & T. Pekdemir & E. Yildiz & A. Nuhoglu, 2004. "Process intensification in wastewater treatment: oxygen transfer characterisation of a jet loop reactor for aerobic biological wastewater treatment," International Journal of Environmental Technology and Management, Inderscience Enterprises Ltd, vol. 4(3), pages 220-235.
    • Handle: RePEc:ids:ijetma:v:4:y:2004:i:3:p:220-235
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    Cited by:

    1. Khumbo Kalulu & Bernard Thole & Theresa Mkandawire & Grant Kululanga, 2020. "Application of Process Intensification in the Treatment of Pit Latrine Sludge from Informal Settlements in Blantyre City, Malawi," IJERPH, MDPI, vol. 17(9), pages 1-14, May.

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